/Engine/Source/Developer/GeometryProcessingInterfaces/Public/IGeometryProcessingInterfacesModule.h
implementation ofIGeometryProcessing_CombineMeshInstances, if available, or nullptr (result is cached internally)
[IGeometryProcessing_CombineMeshInstances](API\Developer\GeometryProcessingInterfaces\GeometryProcessingInterfaces\IGeometryProcess-_1) * GetCombineMeshInstancesImplementation()